Combination heater and maintenance-wagon



H. P. ANDRESEN. COMBINATION HEATER AND MAINTENANCE wAGoN. APPLICATION FILED AUG.27I 1920.

1,376,852. Patented May 3, 1921.

3 SHEETS-SHEET l.

H. P. ANDRESEN. COMBINATION HEATER AND MAINTENANCE wAGoN.

APPLICATION FILED AUG.Z7| 1920. 1,376,852. Patented May 3, 1921.

3 SHEETS-SHEET 2.

@QAM/WIN y@ vH. P. ANDRESEN. COMBINATION HEATER AND MAINTENANCE WAGON.

Y APPUCATION F|LE AUG|25 1920. I 1,376,852. Patented May 3, 1921.

3 SHEETS-SHEET 3.

@MMA

f Unirse stares HERMAN P. ANDRESEN, OF CHICAGO, ILLINOIS,

COMBINATION HEATER AND MAINTENANCE-WAGON.

Specification of Letters Patent.

Patented May 3, i921.

Application led August 27, 1920. Serial No. 406,387.

To all whom it may. concem:

Be it known that I, HERMAN P. ANDRE- sEN, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in l*Combination Heaters and Maintenance-Wagons, of which the following is a specification.

My invention relates generally to wagons or portable apparatus or use in road construction and m mtenance work, and relates more particularly to wagons or portable apparatus adapted for use in construction Work in which the characteristics of some of the material to be used or acted upon requires the application of heat.

For patching or repairing roads or pave-v ments of a bituminous nature, such for example as asphalt, tar bound aggregate and the like, it is necessar to heat materials and also to mix them be ore application to the road or pavement.

For patching or repairing roads or pavements of the bituminous nature beforere-` ferred to, particularly asphalt, it is necessary to remove part of the material around the hole, depression, or other defective place in order that a portable patch or repair can be properly made. This operation can be most readily accomplished by applying heat to the road at that spot, but suitable means for this purpose has not heretofore been provided as a part of a repair wagon or apparatus.

It is an object of my invention to provide a wagon or portable device lof such character that the materialsto be used for the road repair can be properly conditioned for use, and which shall also be adapted to condition the road or pavement for the reception of such road materials. I aim also to provide apparatus whereby all of these operations can be carried on simultaneously, if desired and wherewith it shall be possible to make the repair in less time, with less labor and at less cost than is possible when employing the ap aratus heretofore devised for such Work.

gain it is an object of my invention to provide a device upon which repair materials can be mixed prior to application thereof to the road or pavement, maintained at the conditioned temperature while being mixed, if desired, and which shall Serve also as a device for applying and localizing heat to the road or pavement at the desired place.

It is a particular object of my invention to My invention consists generally in the.

form, arrangement, construction and cooperation of the parts whereby the above named objects, together. with others that' will appear hereinafter, are attainable; and my invention will be more readily under stood by reference to the accompanying drawings which illustrate what I consider at the present time to be the preferred embodiment thereof.

In said drawings:

v Figure l, is a longitudinal vertical section of a device embodying my invention;

Fig. 2 is a view substantially on the line 2-2 of Fig. l;

F ig. 3, is a view substantiallyon the line 3-3 of Fig. 1.

Fig. 4, is a detail fragmentary view of the rear end of the apparatus; and

Fig. 5 is a fragmentary elevation of the rear end.

Apparatus of this character is of particular use in repairing and patching roads and pavements of a bituminous nature such as asphalt, tar bound aggregate, etc., and, for this reason, I shall describe the apparatus with especial relation to such work. rIhis, it should be understood is by way of illustration and not by Way of limitation.

The apparatus here shown is a wagon and .comprises a front axle l, and a rear axle 2 upon which suitable road wheels are mountedfor travel upon the ground 3. Upon these wheels a superstructure of novel form is mounted. As here shown it is composed of side plates 4 and 5 which are spaced apart and which together with the front plate 6, rear plate 7 and bottom plates 8 and 9 form a box like inclosure hereinafter termed a lire box.

At the forward part of the apparatus I arrange a vessel or tank ll in which material 12 is heated. This material will. frequently be a bituminous material such as'tar, asphalt and the like which must be brought to proper temperature for use. The vessel 1l is suitably supported from the side and end plates by means of the angle irons 13 and 14` and the' bottom of the vessel is supported 'somewhat above| the plate 8, thel'eby lforming a passageway for the gases of combustion. A'smoke stack 1.5 having a damper 16 therein leads from the frontplate l6.

At the rear end of thewa-gon I have pi'ovidedvbins or containers 17 and 18 in which, Ordinarily, and the like, indicated a-tj'19, will be placed.

' Relatively more of theaggregate material is used in repair work than of the tar, as-

1 phalt or binder materialand the aggregate -materialis often times wet or damp so that it must bevfirst dri'cdfby driving 0H' the .moisture and then raised'to suitable working temperature. I aim to provide means whereby this can be effectively accomplished with such speed that no appreciable delay shall be caused due to the necessity of waiting for the aggregate materials tobe raised -to working temperature. As willbe shown hereafter this results in certain advantages with respect to .the heating of the tar, as-

Vphalt or other bituminous materials. In

orderfto provide large lheating surfaces for the bins 17 and 18 I have spaced inner walls 17 and 18 thereof a short distance apart, thus providing a passageway 18 therebetween intoand through which the products of combustion can flow. imparted heat to the plates 17 wliicl1,in turn, give off their heat to the aggregate material in the bins, and serve to drive off the moisture and furnish a preliminary heatingof the aggregate material. The bottom plates 25 of the aggregate bins are preferably inclined at such an angle as 4will enable the aggregate material to slide or fall by gravity when the control gates 26 or 27 ai'e opened. Before the aggregate material can pass through the gates 26 or 27 it must pass by additionall heating surfaces. In this instance these heating surfaces take the form of groups of flues 28 and 29, respectively which extend between the lower or bottom plates 25 ofthe aggregate bins and the upper plates 30 and 31, respecoperation of distributing the products of combustion therein. In the present instance a fuel box 35 is positioned in the central lower part of the fire box and is provided with a grate 36 uponvwhich the fuel 37 is supported. The fuel may -be placed upon the grate through the fuel door 38. I preagg-regate suchas gravel, stone.

Thereby there is and 18 fer to place the grate substantially centrally of the apparatus so that the gases may find their escape easily through either of the stacks 15 or Such gases as are permitted to pass through the stack 15 must obviously engage the walls of the vessel 11 and heat the material 12 therein. A greater part of the products of combustion will pass outwardly through the stack On their way to they stack 33 partthereof will pass upwardly into the space 18 between the two aggregate bins and in order to prevent direct flow in the stack 38, or conversely to" cause them to fiow a longer distance, I have inserted a .baille plate 39 which causes Such gases to pass downward under the lower end `39 thereof at which time they vcan pass up.

wardly and between the two plates 17 and 18 at the rear of the baffle plate 39 and through the smoke box 32 into the stack 33. A considerable part of the gases will flow upwardly through the ues 28v and 29 and much of such gas comes directly from the grate. and hence will be very hot, resulting in raising the temperature of the flues to a high degree.

18 they have become preliminarily heated and are quickly brought or raised to the final desired temperature by engagement with the liot flues or pipes 28and 29.

By means of the dampers 16 and 34 the effective size of the smoke stacks may be varied. These dampers or valves are provided not only for the purpose of regulating the amount of air that shall pass through the grate for combustion purposes, but also to the end that a smaller quantity of the gases of combustion may pass through one of the smoke stacks thanr through the other. That is to say, by regulating the dampers 16 and 34 such proportion of the total volume of the products of combustion generated maybe caused to flow through one stack as is desired, and the vremainder through the other. Thus all danger of overheating oneof the materials and underlieating the other is avoided. At the same time a much greater quantity of aggregate material can be raised to desired temperature with such speed that the work is not delayed waiting for the heating thereof. Y

For the discharge of the material from the vessel 11 I provide an inclined pipe 40 the lower end of which extends fora considerable distance through the fire box and the `upper end of which is carried outside of the tire box but relatively close thereto. I desire to keep the material12 hot as it flows. I also desire-to have a valve controlling -the flow thereof positioned relatively close to the vessel 1-1. If this valve were located within the fire box the material would become coked in the valve. I overcome this difficulty and Thus after the moisture has been driven fromthe aggregate by trie heat imparted thereto through the walls 17 and stillsecure the desired' heating by mounting box where it can be conveniently from the rear of the apparatus y means of the pull rod 42 and the lever 43. l A short length of' pipe 40 connects with the pipe 40 that is arranged in the fire box. At times it may be desirable for some purposes to .draw material directly from the vesselll and I have, therefore, provided a valve 44 for that purpose. In this manner the material can beproperl flowed and heated without any danger o coking or stopping the valve.

For the purpose of mixing the materials which have been heated in the wagon I provide a mixing pan 52. This pan, as here shown, comprises a bottom 53, back wall 54, together with substantially triangular end walls 55 and 56. Dependent from vthe bottom 53 will be found side walls 57 and 58 which are connected at the ends by walls 59 and 60 and which, therefore,. fo rm a boxlike space or inclosure 61. The bottom edges of the walls 7 8, 9 and 1D are positioned to terminate slightly above the road means of the pipe 67. Connection between.- pipe 63- is spraying the fuel through th burners under A or ground 3.

The ,whole pan is mounted upon a trans-.-

verse pipe 63, which pipe forms a dual purpose, to-wit, that of a pivot for the an'and also as a conduit to supply fuel to urners 64 mounted under the bottom wall 63 of the pan. Pipe 63 at one end is connected to a riser pipe 65, which, in turn, is connected to a liquid fuel reservoir-66 as by the burners 64 and transverse made by means of connecting plpes 68. I prefer to use a liquid fuel for the burners 64 and the best result can be obtained by pressure. For this reason I have provided a pump 69 which is connected-by means of a pipe 70 to the fuel reservoir 66 and whereby the fuel in the reservoir 66 can be placed under pressure. The supply of fuel to the burners 64 can be suitably controlled by means of the valve 71. j

In the use of the devicethe mixing pan will be placed over the part of the. pavement to be repaired and the .burners 64 lighted.- As shown they direct the flame downwardly against the pavement and the heat generated thereby is confined or localized to the desired zone by means of the walls 57, 58, 59 and 60. While the pavement is being heated, the workmen can proceed to mix materials for application thereto. The materials, previously heated in the 4 will be discharged through either or both of the doors or discharge openings 26 and 27, whereas the heated bituminous material terial mixing pan,

vsich as tar, as halt or the like will be disthe control valve 41 Just outslde of the fire li controlled,

charged upon t e pan through the discharge pipe 40. I While the materials are being mixed in the 'pan' theycan be maintained at desired working temperature for mixing an application by means of the heat rising through the bottom 53. Thus the burners 54 may serve not only to heat pavement but also to heat or maintain at desired temperature the materials beingvmixed. This isof especial advantage in'. the Winter months when abnormal cooling of the material might occur particularly when only a small amount is being mixed"v for a small patch or repair.' Much economy of time and material is thus effected and the material ideally conditioned for use.- Thus heating of the pavement and the mixing of the material l can be carried on concurrently so that when tion of the apparatus without danger of injury thereto. In this position it also provides a holder in which the various tools and irons canbe carried.

The manyadvantageous features of construction and operation will be understood by those skilled in this art without vfurther comment.

. I claim v 1 4An' apparatus embodying therein a material mixing pan and means for supplying heat thereunder, thereby forming a combined surface heater and mixing pan.

2. An apparatus embodying therein a mameans for supplying heat thereunder, means for conining the heat thereunder against undesired' dissipation, thereby forming a combined surface heater and mixing pan, and means pivotally supporting said mixing pan from the apparatus whereby-itl can be swung to and from operative or mixing position.

3. An apparatus embodying therein a material mixing pan, means for4 supplying heat thereunder, means depending Afrom the material mixing pan for localizing the heat thereunder, thereby forming a combined surface heater and mixing pan, and means pivotally supporting said mixing surface from the apparatus whereby it can be swung to and from operative or mixing position.

admirably which position it is clear of the road a suilcient distance to permit rapid transporta-y 4. An apparatus embodying therein a material mixing pan, means arranged to generate heat and discharge it. under the material mixing pan, thereby forming a combined surface heater and mixing pan, and means for supplying fuel to said heat generating means, said means including a pipe on which said mixing pan is pivoted and which is connected to the heat generating means.

5. An apparatus of the class described, embodying therein a material mixing pan, means arranged to'disharge heat under the mixing pin, thereby forming a combined surface heater and mixing pan, and means for heating material and discharging same in heated condition upon said mixing pan. 6. An apparatus of the class described, embodying therein a material mixin pan, means arranged to discharge heat un( er the mixing pan, thereby forming a combined surface heater and mixing pan, receptacles for holding aggregate material and binder material, means for heating same, and means for discharging said materials in heated condition upon said material mixing pan.

In ,testimony whereof, I have :hereunto set my hand, this twenty-third day of August, 1920.

HERMAN P. ANDRESEN. 

